Heat-exhausting device



Nov. 2, 1926. R 16,456

H. SMlTH HEAT EXHAUSTING DEVICE Original Filed Sept. 7, 1917 JMWM 5mgcombustion engine, such as threaded a coupling Reissuecl Nov. 2, 1926.

UNITED STATES PATENT OFFICE.

HENRY SMITH, OF CUMBERLAND. MARYLAND, ASSIGNOR. BY MESNE ASSIGNMENTS,'IO GENERAL MOTORS RESEARCH CORPORATION OF DETROIT, MICHIGAN, A COR-PORATION OF DELAWARE.

HEAT-EXHAUSTING DEVICE.

Original No. 1280, 569, dated October 1, 1918, Serial No. 160,238, filedSeptember 7, 1917. Application for reissue filed April 28. 1926.

As a heat exhausting device, the invention seeks to provide, as itsprincipal olqect, a compact and eliective means for extracting hotairfrom the cranltcascs of internal coinbustion engines and the like, andreplacing this with cool air.

A further object is to provide a device of this kind "which will becapable of exhausting hot air and admitting cool air to an enginecrankcase in such a inanner as to preclude danger of admitting dust orgrit to the crankcase.

Cheapness of construction and simplicity of structure are other objectsof the invention.

Still another object is to provide means the device whereby thecrankcase may oiled therethrough.

Other and further obiects will appear as the detailed descriptionprogresses.

While the invention is: illustrated in but one of its embodiments, it isnot to be con sidered as restricted to this embodiment. An actualreduction to practice may suggest certain desirable changes oralterations, which the right is claimed to make, 11-. so far as they maybe compatible with the spirit of the subjoined clai1ns.

In the accompanying ClItlWlIltISZ Figure 1 is a side elevation of aninternal is used with autovehicles. This figure shows the manner inwhich the invention is applied to such an engine.

Figure 2 is an end elevation of the structure shown in Figure 1.

Figure 3 is an enlarged view partly in elevation and partly in sectionof the invention per so.

In the drawings, 1 is an iluernal combustion engine provided with acrankcase 2 and the invention is applied to this cranbcase' byattachment the hole through in he in which the crankcase is ordinarilyoiled, as indicated at 3 in Figure 1.

The invention itself comprises the nipple 4 which is threaded in theilOlQ botore rcterred to as existing: in the; rank casing: 2. on the uiper end ot this nipple, there is i 5 which receives on its upper end,by. threaded engagement there with, a second nipple (i. A tubular elbow7 projects from the side of the coupling Serial No. 105.301.

and its free leg, is turned upward, receiving on its end the screw plug8, which is designed as a rlosure nember tor the elbow,

Threaded onto the nipple 6 at its upper end, there is a T 9 whichreceives in opposite ends of its cross leg, by threaded engagementtherewith, the tube 10 and the bushing 11. The tube 12 projectscentrally through the bushing 11 and is rigidly fixed therein, this tubeextending into the cross leg of the T 9 a sufficient distance to permitit to cross the upper end of the nipple 6. On that end of the tube 12which projects out of the bushing 11. a funnel 13 is attached, thisfunnel having a cylindrical hub portion 14 which effects a threadedengagement with the end of the tube 12.,

That. end 15 of the tube 12 which is within the cross leg of the T 9 isfrusto-conical in shape, thus reducing: the diameter of the outlet ofthe tube 12 at this end as compared with the inlet at the other end.Since the tube 12 is designed to take air at its larger end. thisfrusto-conical end 15 has the eliect of creating a vortex at theoutl'ctlof the tube which results in a relatively greater'suction beingset up in the tube 10.

The invention is designed to be applied as shown in Figure l and, as theengine shown therein is'the kind commonly used on autovehicles, theinvention is so positioned that, as the engine is movedtorward by thevehicle which it drives, the funnel 13 gathers a quantity of cool aircurrents which are converged at the apex oi: t e tunnel and pass throughthe tube 12 at a high velocity, being further converged as they pass outthe trusto-conical end 15 of the tube 12. As these air currents pass outof the tube 12 and through the tube 10, they serve to drive all thestill air contained therein out of the latter, creating a partial vacuumwhich results in a suction through t e air outlet from the cranli casing2, WlllC air outlet is conuiosed of the nipples 1 and 6 and theirconnecting coupling 5. Since the tube 12 enters the cross leg of the T 9a sufficient distance to extend across the upper end of the nipple- G,any dust or grit that may be yratl'ierod by the tunnel 13 is driven outthrough the tubclO and thus preiented from dropping into the crankcasing Where it would likely do damage.

Since the device is attached to the crank casing in the hole throughwhich the latter is ordinarily oiled, the elbow T and, plug 8 arepro'-.'idi. d for oiling the crank cas ng at the desired point withoutdisconnecting the device,

Ordinarily aulo-vehicles and the like emplov internal combustion motorsof the four cycle type which, therefore, are not required to havegas-tight crank casings, as is the case with the two-cycle motors. Inthe employment of the present invention, it is preaumcd that the crankcasing can receive air through the bearings and between the edges of itsconnecting sections to take the place of the hot air removed by thedevice; but in case this means of admitting cool air is not suficient, ahole may be formed in the crank casing to admit enough cool air to takethe lace of the hot air removed. This hole is illustrated on the drawingin the form of a breather 16. This breather is of conventionalconstruction and aside from its function in supplyin air to thecrankcase constitutes no part 0 my invention.

I claim:

1. In a heat exhausting device for internal combustion engine crankcasings and the like, an outlet tube, a T positioned on the top thereof,a suction tube connected to one end of the cross-leg of the T, an inlettubeprojecting into said cross-leg through the opposite end thereof, anda unnel at tached to thcend of the inlet tube, the inlet tube having theopening at its free end re duced as compared with the opening at itsother end, whereby air currents may be gathered by the funnel andconverged thereby and by the inlet tube to create a suction in andthrough the suction and outlet tubes.

2. In a heat exhausting device for internal combustion enginecrank-casings and the like, an outlet tube designed for attachment tothe crank-casing of an engine, said outlet tube having an elbowextending laterally therefrom which elbow provides a means for oilingthe crank-casin a T positioned on the to of the outlet to e, a suctiontube con necte to one end of the cross-leg of the T, an inlet tubeprojectin into said crossdeg through the opposite enc thereof, and afunnel attached to the end of the inlet tube, the inlet tube having theopening at its free end reduced as compared with the opening at itsother end, whereby air currents may be gathered by the funnel. andconverged thereby and by the inlet tube to create a suction in andthrough the suction and outlet tubes.

3. In a heat exhausting device for internal combustion enginecrank-casings, and the like, an outlet tube, a T positioned on the topthereof, a suction tube connected to one end of the cross-1e of the T,an inlet tube projecting into said cross-leg through the opposite endthereof and eiitendlng across the upper end of the outlet tube, and afunnel attached to the end of the inlet tube, the inlet tube huvil'igthe opening at its free end reduced as compared with the opening at itsother end, whereby air currents may be gathered by the funnel andconverged there by and by the inlet tube to create a suction in andthrough the suction andoutlet tubes.

4. In a heat exhausting device for internal comlmstion enginecrankcases, and the like, provided with a plurality of openings there'in for communication with the atmosphere, an outlet tube leading fromone ofsaid openings, a fitting positioned on the top thereof andincluding a suction tube communicating with said outlet tube and aninlet tube communicating with said outlet tube and with said suctiontube, said inlet tube and suction tube being arranged substantially inline at the point of communication with said outlet tube, and a funnelsecured to one end of the inlet tube, whereby air currents may begathered by the funnel and converged thereby to create a suction in andthrough the suc- ,tion and outlet tubes, the air drawn from thecrankcase by the suction thus created being replaced by fresh airsupplied through the 0t 1 or opening III the crankcase.

.5. In a heat exhausting device for internal combustion enginecrankcases, and the like, provided with a plurality of openings thereinfor communication with the atmosphere, an outlet tube leading from oneof said openlugs said outlet tube having an extension provided with aremovable closure and servmg as means for supplying oil to thecrankcase, a fitting positioned on the top thereof and including asuction tube communicating withsaid outlet tube and an inlet tubecommunicating with said outlet tube and with said suction tube, saidinlet tube and suction tube being arranged substantially in line at thepoint of oo'mmunication with said outlet tube, and a funnel secured toone end of the inlet tube whereby air currents may be athered by thefunnel and converged there Jy to create a suction in and through thesuction and outlet tubes, the air drawn from the crankcase by thesuction thus created being replaced by fresh air supplied through the otier opening in the crankcase.

' 6. In a heat exhausting device for internal ll combustion enginecrankcases, and the like, provided with a plurality of openings there infor communication with the atmosphere, an outlet tube leading from oneof said openings, a fitting positioned on the top thereof and includinga suction tube communicating with said outlet tube and an inlet tube conmunicating with said outlet tube and with said suction tube andextending across the end of the outlet tube, said inlet tube and suctiontube being arranged substantially in line at the point of communicationwith said outlet tube, and a funnel secured to one end of the inlet tubewhereby air currents may be gathered by the funnel and converged thereyto create a suction in and through the suction and outlet tubes, the airdrawn from the crankcase by the suction thus created being replaced byfresh air an plied through the other opemng in the cran case.

7. In a heat-exhausting device for internal combustion enginecrankcases, and the like, provided with an e ening in communicationwiththe atmosp ere and with an air outlet, a suction tube communicating withsaid air outlet, and an inlet tube communicating with said air outletand with said suction tube, said inlet tube and suction tube beingarranged substantially in line at the point of communication with saidair outlet, said inlet tube having a funnel at its outer end whereby aircurrents may be athered by the funnel and conver ed there- E to create asuction in and throng the suetion tube and air outlet, the air drawnfrom the crankcase by the suction thus created being replaced b freshair supplied through the o ening in t e crankcase. I

8. u a heat exhausting device for internal combustion enginecrankcasings, and the like, provided with an opening therein forcommunication [with the atmosphere and with an air outlet, a suctiontube communicating with the air outlet, an inlet conduit communicatingwith the air outlet and with the suction tube, said inlet conduit havingan outer portion! of enlar -ed cross-sectionandan inner portion of reneed cross-section to provide a funnel, the inner end of the-inletconduit being arranged in close roximity to the inner end of the suctiontu air currents may be thered by the funnel and converged there y tocreate a suction whereby tube in and through the suction and air outlet,the air drawn from the crankcase by the suction thus created being relaced by fresh air supplied through the ot er opening in the crankcase.-

9. Means'for removing heated air from the crankcase of an automobileengine comprising, in combination,' with a crankcase HENRY sMI'rn;

plositioned adja- CERTIFICATE OF CORRECTION.

Reissue Patent No t 113 45$, granted November 2 1926.

to HENRY SMITH,

It is hereby certified that erro: appears in the printed specificationof the above mentioned patent re quiring correction as follows; Page 5,line 42, claim 8, strike out the word "tube and insert the same tofollow after the word "suction" in same line; and that the said LettersPatent should be read with this correction therein that the same mayconform to the record of the case in the Patent Office.

Signed and sealed this 8th day of February, A. D. 1927.

William A. Kinnan,

Sul. Acting Commissioner of Patents.

